ESS Time Statement (for ECC6)

My client created a Time Statement using HR Form Editor (PE50/PE51). I've entered the form name in feature HRFOR, generated feature, but in ESS I get an error message that the form does not exist.

All documentation I've seen so far implies the Time Statement in ESS is only supported using HRFORMS or SMARTFORMS.... Can someone confirm this? Or -- if a time statement CAN be used with Form Editor, please advise what steps I am missing in my config.